[R] Humulus lupulus L. (Cannabinaceae).
Fr: Houblon; Ge: Hopfen; Sp: Lupulo; It: Luppolo; Pt: Lúpulo.
- Herbaceous, perennial plant with rhizome, dioecious, with a twining, climbing, aerial stem (*) . It is found growing wild in hedges and bushes at the edges of forests throughout the central part of Europe.
- It is cultivated in the North of France, in Benelux, in Germany and in England.
- The female flowers or hop cones, are used in brewing.
- There are many varieties, most of German origin, of different sizes, cone forms, precocity and other morphological characteristics.
- The female stocks are trained up long poles (4 to 6 m in length). Harvesting, which is done manually, occurs in August-September, when the cones become yellow. They are then dried.
- Hops propagate by vegetative reproduction.
- A plantation of hop (hop garden) can produce for 10 to 20 years, but the plants may live 100 years.
- Diseases: Hop is attacked by virus diseases (mosaics, leaf roll virus), downy mildew (Pseudoperonospora humili) and powdery mildew due to Sphaerotheca humili.
- Principal European pests: the most serious problems are caused by the two spotted spider mite (Tetranychus urticae) and aphids, in particular the hop-damson aphid (Phorodon humuli).
* Hop (Minost C.)
a: stem; b: leaf with 3-5 lobes moderately pointed and roughly dentate; c: female flower or cone.
HYPPZ on line: Species (scientific names), Pests (common names), Glossary, Crops.
HYP3 : HYPP Phytopathology.